Answers

Add 7/81 and 63/84

7/81 + 63/84 is 271/324.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 84 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 81 × 28 = 2268,
   7/81 = 7 × 28/81 × 28 = 196/2268
3. Likewise, for the 2nd fraction, since 84 × 27 = 2268,
   63/84 = 63 × 27/84 × 27 = 1701/2268
4. Add the two like fractions:
   196/2268 + 1701/2268 = 196 + 1701/2268 = 1897/2268
5. 1897/2268 simplified gives 271/324
6. So, 7/81 + 63/84 = 271/324

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